Gearing.



S. P. WATT.

GEARING.

APPLICATION FILED MAY 29, 1'911.

1 072,538, n Patented Sept. 9, 1913.

,sides of said spur gear.

snRN. P. WATT', or SEATTLE, wnsnrivcf'roiv, Assistentin To WASHINGTON IRON, WORKS COMPANY, QF SEATTLE, A, QORl-QRTIQNL QF WASHINGTON'.

GEARING.

Specification of Letters Patent.

Patented sept. a, 191e.

w appiicatinqnmeari-ay aai-sii. sriainaesaam. Y

vuseful improvements in Greariigig,` of which the following is a specifieati-en .Qf'

This invention relates to gearing, and

particularly to that classyof devices which areuti-lized for transmitting :the motion lof a power shaft to the drum. of a hoisting nia-k n c ,l and 20 represent collars intermediate chine to drive the drum in the samefor in reverse rotary directions, the'winding drums of hoisting engines being a familiar' example of power thus transmitted. The object of my invention. is the improvement of this class of power transmitting devices so as to render the same more powerful and efficient in use.

The invention consists in the novel construction and combination of parts, as will be hereinafter described and claimed.

f In the accompanying` drawings, Figure 1 is a side elevation kof a hoisting engine ofordinary construction with the driving gea-r shown diagrammatically. Fig. 2 is a lplan view of a portion of a hoisting engine of the type shown in the preceding view, illustrating, in horizontal section, my invention applied thereto.

YThe reference numerals 5 and 5 indicate side members of the machine frame which are provided with journal boxes, such as 6, 7 and 8, to respectively accommodate the power shaft 6, the drum shaft 7 and an intermediate shaft 8. Fixedly secured to said'drum-shaft, as by a. key 9, is a spur gear 10 which is driven directlyl from a toothed pinion 11 provided on the vpower shaft f6. As illustrated, there are two winding drums 12 and 13 which are loosely mounted upon the drum-shaft at opposite These drums are each formed at their ends adjacent to the spurgear with annular grooves 14 and 14 to serve as clutch kelements complementary to annular projections 15 and 15 provided upon the sides of the spur gear. Interposed between said spur gear and the kdrums are helical springs 1G and 16 tending to press the respective drums from the spur gear to disengage the clutches thereof.

The engagement of the clutch elements for either of the drums may be accomplished wise movement thereto and for overcoming the power of the adectedg spring. c

Asillustrated, there is providedfor each rigid, with a side member of the machine adjacent ,endll ofthe drum shaft 7,"toloear frically of` thel shaft through a longitudinal slotoit the latter.

bars 19 and 19 and the hubs of the adjacent drums to afford a relatively large bearing surface against the latter. The drum 12 is formed with, or has iixedly secured thereto a toothed gear 21 which is in continuous for rotation to the intermediate shaft 8. A second gear 23 is loosely mounted on the intermediate shaft and is adapted to be coupled with the pinion 22 through the instrumentality of clutch elements such as the annular projection 24 and the groove 25` provided therefor' on the respective parts. The engagement of these clutch lelements may be attainedthrough the agency of devices similar to those described for the aforesaid drum-clutohes; namely, a screw bolt 17, extending through a yoke 18 and bearing against va bar 19 which, in turn, presses against a. collar 20 which .is `juxtaposed with the hub of the gear 23. The gear 23 shaft 6. 27 is a spring acting to separate the gear J3 from the pinion 22 when the screw bolt 17 is retracted.

As illustrated, the drum 13 is arranged yoperated through the agency of the spur gear' 10 when the latter iscoupled thereto by the engagementof theassociated clutch elements 111 and 15 when brought together through the o-iice of the screw bolt 17, as will be understood. `When the clutch elements are separatedby the spring 16 after the bolt 17 is retracted, the dru-m 13 l-will become idle. The other drum 12 derives a similar motion from the referred to spur gear when the respective yclutch elements the screw bolt 17, and also becomes inoper- .ative with respect to the spur lgear when this drum is uncoupled therefrom, as represented n Fig. 2.

mesh with a pinion 22 which is secured' druma screw bolt 17 or 17 extending =v tlnonglr a threaded hole a yokeV v1f@V ory 18",

framed and into a socket provided in the against a bar 19 or 19 extending dianiet- 7 ref is driven by a pinion 26 upon the powervr Vto be driven in but one directionv and is 111-15 are actuated through the 'medium' of I The reverse motion of the drum 12 is attained by actuating the screw bolt 17" to couple the gears 22 and 23 through the me-r dium of the clutch elements 25 and 24 provided thereon. The ensuing action Would then be that the gear 23 Which is continuously driven from the pinion 26 When the termediate the ends of the shaft, a second pinion on said shaft adjacent one end thereof, a driven shaft, a spur gear fixediy mounted on said driven shaft and in mesh with the first-named pinion, a clutch'member carried by said spur gear, an element rot-atably-mounted on the driven shaft and adapted to be engaged with said clutch member, an intermediate shaft, tWo gears upon said intermediate shaft near one end Which V.mesh respectively With the second-named pinion and the rotating element, and means whereby the gears of the intermediate shaft may be coupled for driving the rotating element in a direction contrary to that aiorded by thefrst-named pinion and the spur gear which is in mesh therewith.

SERN P. VATT.

Witnesses:

H. BARNES, E. PETERSON.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Y Washington, D. C. 

